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Tyre drag/efficiency

19 July, 2011 08:17AM
Having recently received some useful references relating to the efficiency of various bicycle transmission/gearing systems, I'm now looking for information/references relating to tyre drag/efficiency. The basic question is: how much power loss is there in the tyre/road interface (this obviously varies with the tyre and how hard it is inflated).

Again there seem to be lots of advice and a few numbers floating around on the web, but I'm wondering if there is actually any authorative research on the subject. Things I've seen (are they true or not?) include:
a) narrow tyres inflated hard are most efficient
b) wide underinflated tyres are very inefficient (15% to 20% power loss?)
c) nobbly tyres are very inefficient on road
d) smooth tyres grip just as well as tyres with some patterned tread

- Murray
Subject Author Posted

Tyre drag/efficiency

Murray R Langton 19 July, 2011 08:17AM

Re: Tyre drag/efficiency

cotterpin 19 July, 2011 11:38AM



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